Two sources, actually. Fowlers PofEE as Alan suggested, but also check out the J2EE patterns (where you'll see the DAO). In CF we have a weird mix of the two.
http://java.sun.com/blueprints/corej2eepatterns/Patterns/index.html Best Wishes, Peter On Apr 28, 2008, at 7:42 AM, Alan Livie wrote: > > Martin Fowler's book Patterns Of Enterprise Application Architecture > covers these issues but his naming conventions differ from our cf > terms sometimes. > > He talks about Service Layer, Row Data Gateway/Table Data Gateway > (similairish to DAO's and Gateway's), Active Record (Reactor), Data > Mapper (Transfer - I think) > > I like a service layer as it means controller code doesn't have to > know about other domain objects. I can ask a service for a bean, I > can ask it to get me a query, I can tell it to insert/update/delete > etc. Some of my services have associations to 10+ DAO's, Gateways > and other services. > I like this thin API approach but others don't. It's not essential > but another preference. > > In the same way Fowlers book offers several ways to encapsulate a > db. You just have to look at your domain and make a decision. > > Alan > ________________________________________ > From: [email protected] [EMAIL PROTECTED] On Behalf Of > wkolcz [EMAIL PROTECTED] > Sent: 28 April 2008 12:20 > To: [email protected] > Subject: [CFCDEV] Re: Noobie Question > > Thanks. I guess then it might be better to ask when is it most > appropriate to interact the controller with a Service Object and > when to interact with a bean to utilize the DOA and Gateway objects? > I need to learn what is the strong point and weakness of both so I > can know when a situation warrants one over the other. > > Wish there was a real one-stop-resource out there to cover OOD for > CF and all the design patterns. :-) > > ________________________________ > From: "Brian Kotek" <[EMAIL PROTECTED]> > Sent: Sunday, April 27, 2008 9:07 PM > To: [email protected] > Subject: [CFCDEV] Re: Noobie Question > > Wally, you're basically asking the question "what is the best way to > build my object model?", which is essentially an unanswerable > question because the answer it "it depends". > > When using Reactor and ColdSpring and Model-Glue, how do you know > that "this way is the better way of doing things"? And what answer > do you expect to the question "is it right to assume one should use > the Service Object to interact with the bean, the DAO, and the > Gateway?" > > The questions that you're asking are so dependent on what your > application actually needs to do, and the forces at play in your > specific environment, that they are nearly meaningless without far > more context. In some cases the answer will be yes and in some, the > answer will be no. > > > On Sun, Apr 27, 2008 at 9:37 PM, Wally Kolcz <[EMAIL PROTECTED]<mailto:[EMAIL > PROTECTED] > >> wrote: > > Another thing. Using Illudium PU-36, it creates a Service Object. > After reading more up on it, is it right to assume one should use > the Service Object to interact with the bean, the DAO, and the > Gateway? > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "CFCDev" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cfcdev?hl=en -~----------~----~----~----~------~----~------~--~---
